Motor-driven fan.



L. D. FREELAND..

MOTOR DRIVEN FAN.

APPLICATION FILED MAR. 21. 1915.

1 ,265,189. Patented May 7,1918.

2 SHEETS--SHEET I.

LA Q5 r Q III #A I L. D. FREELAND.

MOTOR DRIVEN FAN.

APPLICATION FILED MAR. 27. |915.

Patented May 7,1918.

2 SHEETS-SHEET 2.

STATES PATENT oEEIcE.

' morn n'. FEEELA'ND, or CHICAGO, ILLINOIS, AssIGNon 'ro WILLIAM J. H. srnoNG, or

- v BELoIr, WISCONSIN..

norcia-Darwin FAN.

T o all 'whom it may concern.

Be it known that I, 'LLOYD D. Fm'nanANi',a`

citizen of the United States, residing at Chigine being driven by means of eat derived from any suitablel source, as, for `exam le, a lamp in which alcohol or other liquid uel is burned. Inasmuch as the power obtainable from such a source is comparatively small, it is essential that friction be reduced to a minimum. It is, therefore, one of the objects of this invention to provlde a ve light-running mechanism .and one whic may be conveniently adjusted to take up' wear.

Another object of the-inventionis to provide means whereby the mechanism may be easily and safely started and stopped.

It is also an important object 'of the invention to provide a protected ventilation for the source of heat and alsoventilation of the base of the machine for cooling purposes. p

-A further object of the invention is to provide an improved end-thrust bearing for the fan shaft.

Another object of the invention is to provide simple and reliable means for quickly and conveniently connecting al lamp. or other source of heat to the remainder of the structure and for disconnecting it therefrom.

Another object of the invention is to make the entire structure as strong, simple and compact as possible.

The invention also relates to the further lfeatures of improvement hereinafter set forth.

In the accompanying drawmgs, Figure 1 is a rear elevation of a motor-driven fan embodying the features of my invention,l the fan prpper being omitted. Fig. 2 is a verti` .Cal central sectional view taken in the plane of dotted line 2 of Fig. 1. Fig. 3 is an underside -view of a lamp andthe structure in which the lamp is supported. Fig. 4 is'an enlarged sectional view taken in the plane of dotted line 4 o f Fig.4 2. Fig. 5 is a top plan view of a sleeve comprised in the construction. Fig. 6 is a fragmentalside 'view Specicatlon of Letters Patent. l Application med Hai-oh 27, 1915. Serial No. 17,588.

`8 is a section on line 8 of Fig. 2.

'Patented May .7, 191s.

of the sleeve. Fi 7 is 'a view of a roller bearing employed 1n theconstruction. Fig.

vThe-embodiment which has been selected to illustrate the invention comprises a base 1 which is chambered to receive the lamp\ and a portion ofthe engine, said base com- 'prising a flan eA 2 which may be equipped with feet 2*'a apted to rest upon a suitable support. The contracted upper end of the 55 base 1 has an opening 3 therein to receive the lower end of .the cylinder 4'l of the engine. One or more set screws 5 Isecure the cylin' der to the base. These screws extend into an annular inder..

The fan shaft and the guard casing that inclo'ses the fan blades are carried by an approxlmately spherical casing 6, which casmg comprises two substantially similar sec- 'l5 tions 6 and 6b, and a removable cover section 6c. The casing 6 is provided with an annular base flange 7 which is adapted to fit upon an outwardlv extending annular flange flanges 7 an screws 9.

10 is a heater having a closed lower end and an open upper end which communicates 8 upon the up er end of the cylinder 4. The $0 8 are secured together by with the cylinder 4. The heater 10 may be 85 of any suitable construction. Preferably it consists of a tube having'- relatively thin walls and formed of metal which is a good conductor of heat. The tubemay be connected withthe cylinder 4 in any suitable 90 way. Herein I\ have shown the upper porltion of the heater-10 as expanded into lockingengagement with an internal annular groove 1l in the cylinder. The heat from a lamp or other source of heat is directed against the lower end of the heater. To conserve the heat and cause the heated air or products of combustion to pass upwardly close to the heater, I provide a sleeve 12 snrrounding the lower portion of the :heater 100 and extending below the. heater, said sleeve providing an annular passage 13 for the heatedk air or products of combustion. In the upper end of the sleeve 12 are outlet y openings 14. After passing out through the 105 openings 14, the hot air or combustion prodg ucts escape tothe atmosphere Athrough openings 15 formed in the upper portion of the base 1.

groove in the lower end of thecyl- 70.

While the sleeve `12 may be held in place 110' in Aany suitable manner, I have herein shown it as securedv by the means to be `now described: Within the upper portion of the base 1 is a plurality of stop shoulders 16 and below each stop shoulder is a rib 17,

the .upper end of which .rib constitutes a supporting shoulder 18.` On the upper end .of the sleeve 12 is an outwardly extending liange 19 which is notched at 20 topass the ribs 17. The liange 19-is adapted .to lie in the space between the shoulders 16 and 18. At one side of each notch 20, the fiange is of wedging or cam formation. After. inserting the sleeve 12 upwardl into 4the base until the liange 19 stops against the shoulders 16, the sleeve may be given a partial rotation to carry the notches 2O out of register with'the ribs 17 and thus place the flange 19 between the pairs of shoulders 16 and 18, the turning movement being continued to the extent permitted by the cam or wedgin formation of the flan e.

Above t e -outlet openings 14, t e sleeve 12 is closed by suitable means, as for example, an annular partition or diaphragm comprising in this instance two sheet-metal rings 21 with an interposed layer 22 of asbestos or other heat insulation. The rings 21 and layer 22 are clamped between the stop shoulders 16 and a shoulder 23 on the sleeve 12.

U on the lower end of the sleeve 12 is fixed) a guard or extension -24, the lower end of which is extended inwardly to surround a burner suiicient space being provided around the burner to admit air to support combustion. The guard 24 provides within it a combustion chamber 24".

The sleeve 12, together with the partition at its upper end and the guard 24 at its lower, thus forms a vcasing completely inclosing the lower portion of the heater, the airto support combustion being drawn through the inlet opening around the burner, in the lower end of said casing, and the gases of combustion being conveyed away from the heater at the upper end of the casing' through the outlet openings 14 therein. By this construction the hot gases of combustion are confined to the lower portion of the heater so that the upper portion thereof adjacent the lower end of the power cylinder is not subject to the action of said The source of heat comprises in this instance a lamp consisting of a flat circular font 25, and a burner 26 located centrally of the font. The lamp is arranged to be supported with the upper side of the font in Contact with a plurality of lugs `27 formed upon the inner surface of the base 1. The means for thus supporting the lamp comprises, in the present embodiment, two approximately semi-circular arms 28 pivoted to the base 1 and adapted to embrace the rfont.' The arms 28 may be pivotally con-` vided with a perforation to receive a stud 29 cast integral with the base 1, a plate 30 'being arranged to underlie the studs and thus' retain. the arms upon the stud. The plate 30 is secured in place b means of a screw 31. The opposite ends of t e arms 28 are provided with ngerpieces 32 which project upwardly through o enings in the base. As vthe arms 28 exten ast each other, they may be moved away om each other to release the lamp by pressing the ngerpieces 32 toward each other. A tension-spring 33 normally holds the arms 28 in the position shownn Fig.'3. 28a (Fig. 3) are pins or the like set in the base flange 2 and serving to support the arms 28.

The periphery of the font 25 is beveled as at34 for two reasons, namely, to provide space for the upward flow of air, and in order that when the base 1 is the lamp, the arms 28 shall be orced apart to pass the plane ofthe greatest diameter of the font. The lower portion of the periphery ofthe font is beveled in the opposite direction to enable the arms 28 to force the font upwardly into contact with.\the stop shoulders 27.

annular series of air inlet openings 35 are provided in the lower portion of the base 1 to admit air to support combustion and to keep the base and the font cool.

The mechanism of the engine comprises a power piston 36 arranged to operate within the engine cylinder 4, and a transfer piston laced upon A the heated air from the heater to the engine cylinder and back in the well known man` ner. The transfer piston is attached to a piston-rod 38 which passes slidably through a guidefopening 39 in the power piston` 36. The fan shaft 40 is provided with ltwo transfer piston has a greater throw than the crank 42 for the power piston and is set 90 in advance of the crank 42. In order to reduce 'friction to the minimum, the shaft 40 is supported in two roller bearings, which bearings-are preferably constructed in the followmg described manner. In Fig.4, 43 is a split ring secured to the casing 6 by any -suitable means such as two screws 44. The ends of the ring 43 are connected by means of a screw 45. 45 is a lock nut. Projecting inwardly from the rin 43 is a plurality of forks 46 in which rol ers 47 are rotatably supported. Two such roller bearings are provided, one for each end portion of the fan shaft. The rings 43Ymay be contracted to adjust the rollers to the shaft, both initially and to take up wear, by operating the screws 45.

'110: cranks 41 and 42. The cra'nk 41 for the To the power piston 36is ,pivoted a connectin rod 48 and to the piston-rod 38 is pivote a connecting rod 49. These connecting rods engagethe cranks 41 and 42 by means of roller bearings 50 fand 51. The

connecting rods 48 and 49are integral or otherwise secured to the split rings of their res ective roller bearings.

.counterweight 52 may be attached to the shaft -40 to balance the moving parts.

' One end 52'1 of the-hub or attaching portion of the counterbalance is arranged adjacent- 'to the roller bearing for the rear portion of g the fan shaft. In operation, the `thrust of the fan placesl said hub incontact withlie rollers 47 of said roller bearing, the thrust of the fan being thus borne by the rolllng elements 47 and 52". v A

The fanblades 53 may be of any suitable character and may be attached to the shaft in any preferred manner. The guard 54' A- may be of any ordinary vconstruction ,and

may be supported from the forward end' o f the casing 6 in any desired way.

A starting and stopping projection 55 may be aiiixed to the' extended rear end of the shaft 40. Said projection is preferably cy` Y Alindrical and smooth so that it may be conveniently and safely grasped in manually starting and stopping the rotatlon of the shaft. If desired, the projection 55may be grooved as at 55l to serve as a pulley. The forward end of the projection 55 may extend into proper relation to the rear roller bearf ing for the shaft so as to limit longitudinal movement of the shaft in one direction.

In practice, after the lamp has `been lled and lighted, the base 1 is placed'upon the lamp, the arms 28 yielding to pass the plane of the greatest diameter ofthe fontandl thereafter approaching` each other to support the font in contact with the stop shoulders 27. The air is heated in the heater 10 by the flame, and the rotation of the shaft 40 having been started by manually turning the projection 55, the heated air is transferred lfrom the hot end of the heater 10 to the en- The engine ycylinder is ribbed or otherwisesuitably adapted to radiate heat;A

When it is desired to stoptemporarily the operation of the fan, the projection 55 is grasped; land ifit is desired to put yout thel ame of the lamp, the finger pieces 32 are l22 serves to `hold the heater pressed toward -each other tov release the f lamp, the base 1 raised oif the'lamp, the

flame extinguished and the base replaced upon the lamp.

The multiplicity of openings 14 and 15 causes the-hot airy and `products of com-v bustion to be discharged in a diffused manner. These -openings beingbelow the fan,

ther hot air and products of'combustion are 4 v not caught by the fan and driven along with the air current, as would be the case if the outlet or outlets were higher.

Theupward owof a1r between the base and the heaterl 10' serves' to keep the base l sufficiently cool 'so that the base may be' danger of burning Itouched or lifted without theahand Y The sleeve' 12 and the guard 24 serve' to extinguish theflame.

- The ard 24v serves to intercept radiant heat and thus assists to protect the font 2 5 against overheating.

.The partition formed vof the rings 21 and relation to the base and the lam The screws 5 need not be driven tight] against the cylinder 4, but ma be left su ciently loose' so that the turned'inv order to face the fan in the desired direction, the partition 21, 22 permitting` the heater 10 to turn with the cylinder.

While I have described the present embod- 10 in central protect the flame against drafts tending to. l

cylinder may be iment of my invention with considerable parl ticularity, it will be understood that the inventionis not restricted to the construction vand arrangement shown, and that various changes may be made without departing from the spirit and scope of the invention as set forth in the appended claims.

The roller bearings herein disclosed are claimed in my divisional application Serial i No. 122,945, filed August 6, 1916.

I claim as my invention:

1. In combination, a base, a power cylinder extending upwardly and a heater extending downwardly from the upper'end of the base and in axial alinement with the power cylinder, a casing surrounding the lower'portion ofthe heater and having laterally extending means engaging with ythe base whereby the casing is supported by the base, and a burner extending into the cas ing below the heater, there being an air inletopening in the lower end of said casing around said burner and a plurality of outlet openings near the upper end of the casing arranged to convey the hot gases of combustion away from the heater at a point substantially midway .between the ends of the heater.

2. In combination, a base, an engine cylinder supported by the base, a heater axially alined with and 'communicating with the cylinder, a source of heat below the heater, a tubular structure surrounding the heater and extending below the heater, said structure being supported by the base, an annular air space bemg provided between the tubular structure and the heater, and an air space being provided between the tubular structure and the base, theupper porinder secured to and extending upwardly from the base, a heater-alined with and extending downwardly from the cylinder, a

source of heat below -the heater, a sleeve within the base and surroundin thevheater, the upper portion of the sleeve aving ventilating openings, an annular non-conducting partition at the upper end of the sleeve, an air space being provlded around the heater above the partition, and an air space being provided between the sleeve and the base, the upper portion of the base having outlet opemngs that communicate with bot 1 of said spaces.

4. In combination, a base, an engine cyl- `.inder secured to and extending upwardly from the base,

a'heater alined with the cylinder, the upper end of the heater and the upper end of the base being in approximately the same horizontal plane, the heater being 'composed wholly of relatively thin metal, a source of heat below. the heater arid within the base, anda partition in the base located approximately midway of the length of the heater, the base having ventilating openings above and below said partition.

5. In combination, an engine cylinder, a heater alined with and communicating with said cylinder, a source of heat below the heater, a sleeve surrounding and extending below the heater, said sleeve having means adjacent to its upper end for the escape of ings. v In combination,

.surrounding the heater,

:,aearse linder secured to and extending upwar ly from said base, a heater alined with and extending downwardly from said cylinder, a source of heat below the heater, a sleeve within and attached to the base, said sleeve surrounding and extending below the heater, said sleeve having means adjacent to its upper end for the escape of products of combustion, and non-conducting means for closing the upper end of the sleeve, an annular air space being rovided between the sleeve and the base, t e upper end of the base having outlet openings, and the lower portion of the base having air inlet opena base having pairs of opposed shoulders therein, a heater supported by said base,'and a sleeve surroundlng the heater, adapted to lie between the pairs of shoulders, said ange being notched to permitthe :flange to pass certain of said shoulders.

8. In combination, a base having a plurality of stop shoulders therein, a rib below each stop shoulder, the upper end of each rib providing a supporting shoulder, a heater supported by said base, and a sleeve y said sleeve having a ange adapted to lie between the pairs of stop shoulders and supporting shoulders, said fiange being notched to permit the flange to pass said ribs.

9. In combination, a base having an opening in its upper end, an engine cylinder having its lower end secured 1n said opening, a heater Secured to the engine cylinder,

an approximately spherical casin to the engine cylinder, a crank saft supported within and by said casing, a power piston in the engine cylinder, a transfer piston in the heater, and operating connections between the crank shaft and said pistons. v I

In testimony whereof, I hereunto set my hand in the presence of two witnesses.

LLOYD D. FREELAND.

Inthe presence of- GEORGE L. CHINDAHL, MARGARET H. MANN.

secured said sleeve having a ange' 

